From owner-freebsd-hackers Thu Feb 8 5:25:35 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from flood.ping.uio.no (flood.ping.uio.no [129.240.78.31]) by hub.freebsd.org (Postfix) with ESMTP id A7E4737B65D; Thu, 8 Feb 2001 05:25:10 -0800 (PST) Received: (from des@localhost) by flood.ping.uio.no (8.9.3/8.9.3) id OAA67849; Thu, 8 Feb 2001 14:24:39 +0100 (CET) (envelope-from des@ofug.org) X-URL: http://www.ofug.org/~des/ X-Disclaimer: The views expressed in this message do not necessarily coincide with those of any organisation or company with which I am or have been affiliated. To: Julian Elischer Cc: Josef Karthauser , Robert Watson , Brian Somers , Bruce Evans , freebsd-current@FreeBSD.ORG, freebsd-hackers@FreeBSD.ORG Subject: Re: What's changed recently with vmware/linuxemu/file I/O References: <20010208113519.A789@tao.org.uk> <3A828C2C.F7CDA809@elischer.org> From: Dag-Erling Smorgrav Date: 08 Feb 2001 14:24:39 +0100 In-Reply-To: Julian Elischer's message of "Thu, 08 Feb 2001 04:08:12 -0800" Message-ID: Lines: 12 User-Agent: Gnus/5.0802 (Gnus v5.8.2) Emacs/20.4 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Julian Elischer writes: > I believe that vmware mmaps a region of memory and then somehow syncs > it to disk. (It is certainly doing something like it here). Theory: VMWare mmaps a region of memory corresponding to the virtual machine's "physical" RAM, then touches every page during startup. Unless some form of clustering is done, this causes 16384 write operations for a 64 MB virtual machine... DES -- Dag-Erling Smorgrav - des@ofug.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message